It’s impossible to restore a deleted Snapchat account. The data for your account is also erased when you cancel it. You must start over.
How to Recover Deleted Snapchat Account
How To Recover/Reactivate Deleted Snapchat Account iOS+Android TUTORIAL
No, you won’t be able to access your Snapchat account after 30 days, because it is a time limit imposed by Snapchat. If your account isn’t reactivated within 30 days, it will be permanently deleted.
The data that you’ve shared with us, which includes your account, preferences, friends, Snaps, Chats, Storys, device data, and location information will be deleted. We may keep some personal information for legal and security reasons.
On the Chat screen, check the snap status below the person’s username. If it says “Pending” and never delivers, or if the person’s username has an arrow next to it that is gray, they may have deleted you from their friend list.
Users that have blocked you won’t appear when you look for them on Snapchat. You should be able to discover them if they’ve removed you from their Friends list.
When you’ve never snapped with another person, the gray box symbol appears. It might also indicate that a person has blocked you or that they haven’t accepted your friend request. The color gray implies that something is pending in most cases.
To delete Snapchat, go to the account control panel and enter your username (or email) and password. You may also terminate your membership by going to Snapchat.com and clicking “Support” at the bottom of the page. On the left side of the Support page, choose “My Account & Security” then “Delete My Account.”